If a:b = 2:4 and b:c = 4:8, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:4 and b:c = 4:8, then a:b:c = ?

A. 1:4:9

B. 2:5:8

C. 2:4:8

D. 4:8:16

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:4, b:c = 4:8 ⇒ a:b:c = 2:4:8.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 9:4 in a 416 L mixture. Quantity of milk?

A. 128 L

B. 576 L

C. 288 L

D. 313 L

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Correct Answer: Option C

Explanation:
Total parts = 13. Milk = [9 / (9+4)] × 416 = 288 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 6:10 and b:c = 10:6, then a:b:c = ?

A. 6:11:6

B. 6:10:6

C. 5:10:7

D. 12:20:12

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 6:10, b:c = 10:6 ⇒ a:b:c = 6:10:6.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 8:4 and b:c = 4:11, then a:b:c = ?

A. 16:8:22

B. 8:5:11

C. 8:4:11

D. 7:4:12

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 8:4, b:c = 4:11 ⇒ a:b:c = 8:4:11.

This question belongs to: Maths Ratio and Proportion

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